Example 1. An image in the MNIST dataset has gray-scale pixels of
spatial resolution \(32\times 32\) . Its raw dimension is 1,024. LeNet-5
[1]} was designed for the MNIST dataset. It has two cascaded
convolutional-pooling layers. At the output of the 2nd
convolutional-pooling layers, one obtains an embedding space of
dimension \(5 \times 5 \times 16 =400\) .
